Here is an ebuild for pygraphviz. Pygraphviz is the python binding for the the agraph library in graphviz. Homepage is at http://networkx.lanl.gov/pygraphviz/
Created attachment 177060 [details] pygraphviz-0.99.1.ebuild
First of all, thank you for your contribution. Please consider taking another step and consider contacting sunrise project on #gentoo-sunrise @FreeNode (best around evening in Europe) and reading their documentation[1][2]. And please be patient and give them some time to review.
Now in portage. Thanks for your input!